Shell tricks

Sudo privilege escalation

if [ "$(id -u)" != 0]; then
    sudo "$0" "$*"
    exit $?
fi

Posix Documentation

https://pubs.opengroup.org/onlinepubs/009695399/utilities/xcu_chap02.html

Parameter expansion

Section 2.6.2 of the documentation
Expansion can differ depending on parameter value and set status and possibly assign. Substitution can also provide string length and prefix/suffix patterns.

Useful templates

7zip compression

7z a -t7z [OUTPUT FILE].7z -m0=lzma2 -mx=9 [INPUT FILE]

DokuWiki

Table of Contents

Shell tricks

Sudo privilege escalation

Posix Documentation

Parameter expansion

Useful templates

7zip compression